diff options
Diffstat (limited to 'rust/kernel/ptr.rs')
| -rw-r--r-- | rust/kernel/ptr.rs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/rust/kernel/ptr.rs b/rust/kernel/ptr.rs index 3f3e529e9f58..82acb531b17b 100644 --- a/rust/kernel/ptr.rs +++ b/rust/kernel/ptr.rs @@ -235,11 +235,20 @@ impl_alignable_uint!(u8, u16, u32, u64, usize); /// /// This is a generalization of [`size_of`] that works for dynamically sized types. pub trait KnownSize { + /// Minimum size of this type known at compile-time. + const MIN_SIZE: usize; + + /// Minimum alignment of this type known at compile-time. + const MIN_ALIGN: Alignment; + /// Get the size of an object of this type in bytes, with the metadata of the given pointer. fn size(p: *const Self) -> usize; } impl<T> KnownSize for T { + const MIN_SIZE: usize = size_of::<T>(); + const MIN_ALIGN: Alignment = Alignment::of::<T>(); + #[inline(always)] fn size(_: *const Self) -> usize { size_of::<T>() @@ -247,6 +256,9 @@ impl<T> KnownSize for T { } impl<T> KnownSize for [T] { + const MIN_SIZE: usize = 0; + const MIN_ALIGN: Alignment = Alignment::of::<T>(); + #[inline(always)] fn size(p: *const Self) -> usize { p.len() * size_of::<T>() |